[HumblePie]

While this doesn't answer the original question, I'll share anyway.

We are fortunate to have access to a 3D printer, so when we had determined our favorite shooter radius (empirically), we modeled a template (in 3 interlocking sections to fit in the printer envelope) and printed the contour we wanted. The template was applied to a rough cut piece of plywood and run across a router table with a piloted trim bit. Voila! The finished piece was rigid, lightweight, and had a consistent radius. I must admit I went a little overboard with the stain and polyurethane, but it's GOT to look good, right?